diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e7eb57a1a5..3069add21b 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2013-03-12  Hui Zhu  <hui@codesourcery.com>
+
+	* dwarf2loc.c (dwarf2_compile_expr_to_ax): Update error message.
+
 2013-03-12  Yao Qi  <yao@codesourcery.com>
 	    Hui Zhu  <hui@codesourcery.com>
 
diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
index f6fa4200a4..625d8592ad 100644
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -2934,8 +2934,8 @@ dwarf2_compile_expr_to_ax (struct agent_expr *expr, struct axs_value *loc,
 	      size = addr_size;
 
 	    if (size != 1 && size != 2 && size != 4 && size != 8)
-	      error (_("Refn doesn't support size %d"),
-		     size * TARGET_CHAR_BIT);
+	      error (_("Unsupported size %d in %s"),
+		     size, get_DW_OP_name (op));
 	    access_memory (arch, expr, size * TARGET_CHAR_BIT);
 	  }
 	  break;